SCS 2159- GI
What are the four basic digestive processes? - ANS-1. Digestion
2. Absorption
3. Secretion
4. Motility
What are the accessory glands and associated structures of the GI system? - ANS-Salivary
glands
Liver
Gallbladder
Pancreas
What are the main organs of the GI tract? - ANS-mouth, pharynx, esophagus, stomach, small
intestine, large intestine
What are the four major layers of the GI wall? (From inside to out) - ANS-Mucosa, Submucosa,
muscularis externa, serosa
What are the three layers of the mucosa (in to out)? - ANS-Mucous membrane, lamina propria,
muscularis mucosae
What does the mucous membrane do? - ANS-Lines the lumen
What does the lamina propria contain/ do? - ANS-Contains nerves, lymph vessels, blood
vessels
Helps fight disease and bacteria
What does the muscularis mucosae do? - ANS-Smooth muscle that produces local movements
of mucosa
What is the submucosa? - ANS-Thick layer of connective tissue that keeps walls disdendable
and elastic to allow stretch and bend. Contains nerve cells known as the submucosal plexus
which is part of the enteric nervous system.
What is the muscularis externa? - ANS-Responsible for the motility of the GI tract and contains
the myenteric plexus which is the second part of the enteric nervous system. Inner circular and
outer longitudinal layers.
What is the serosa? - ANS-The outer most layer of the GI wall and mainly composed of
connective tissue.
What are the four basic digestive processes? - ANS-1. Digestion
2. Absorption
3. Secretion
4. Motility
What are the accessory glands and associated structures of the GI system? - ANS-Salivary
glands
Liver
Gallbladder
Pancreas
What are the main organs of the GI tract? - ANS-mouth, pharynx, esophagus, stomach, small
intestine, large intestine
What are the four major layers of the GI wall? (From inside to out) - ANS-Mucosa, Submucosa,
muscularis externa, serosa
What are the three layers of the mucosa (in to out)? - ANS-Mucous membrane, lamina propria,
muscularis mucosae
What does the mucous membrane do? - ANS-Lines the lumen
What does the lamina propria contain/ do? - ANS-Contains nerves, lymph vessels, blood
vessels
Helps fight disease and bacteria
What does the muscularis mucosae do? - ANS-Smooth muscle that produces local movements
of mucosa
What is the submucosa? - ANS-Thick layer of connective tissue that keeps walls disdendable
and elastic to allow stretch and bend. Contains nerve cells known as the submucosal plexus
which is part of the enteric nervous system.
What is the muscularis externa? - ANS-Responsible for the motility of the GI tract and contains
the myenteric plexus which is the second part of the enteric nervous system. Inner circular and
outer longitudinal layers.
What is the serosa? - ANS-The outer most layer of the GI wall and mainly composed of
connective tissue.